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Chapter 2: Board Components
2–23
Clock Circuitry
February 2011
Altera Corporation
Arria II GX FPGA Development Board Reference Manual
Arria II GX FPGA Clock Outputs
Figure 2–7
shows the Arria II GX FPGA development board clock outputs.
Table 2–21
lists the clock outputs for the Arria II GX FPGA development board.
Figure 2–7. Arria II GX FPGA Development Board Clock Outputs
Q 0
Q 1
Q 2
Q 3
3B
3A
4A
4B
8B
8A
7A
7B
6 B
6 A
5 A
5 B
PLL 1
PLL 2
PLL 3
PLL 4
EP2AGX125EF35
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
HSMA_CLKOUT_P[1]/N[1]
(LVDS)
HSMB_CLKOUT_P[2]/N[2]
(L
V
D
S
)
HSMB_CLKOUT0
HSMA_CLKOUT0
PLL
5
PLL
6
CLOCK_SMA
SMA
DDR3_CLK_P/N
(Differential SSTL-15)
HSMA_CLKOUT_P[2]/N[2]
(LVDS)
(2.5 V)
HSMB_CLKOUT_P[2]/N[2]
(LVDS)
DDR2_CLK_P/N[1:0]
(Differential SSTL-18)
(2.5 V)
(2.5 V)
Table 2–21. Arria II GX FPGA Development Board Clock Outputs
Connector
Schematic Signal Name
Pin
I/O Standard
Description
SMA
CLKOUT_SMA
F23
2.5-V
FPGA CMOS output or general purpose I/O (GPIO)
Samtec HSMC
HSMA_CLKOUT0
P10
2.5-V
FPGA CMOS output or GPIO
Samtec HSMC
HSMA_CLKOUT_P1
AD7
LVDS or 2.5-V
LVDS output or two 2.5-V CMOS outputs.
HSMA_CLKOUT_N1
AD6
Samtec HSMC
HSMA_CLKOUT_P2
V12
LVDS or 2.5-V
LVDS output or two 2.5-V CMOS outputs.
HSMA_CLKOUT_N2
W12
Samtec HSMC
HSMB_CLKOUT0
AG30
2.5-V
FPGA CMOS output or GPIO
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